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Benzimidazole resistance in a herd of horses
Love, S.; McKellar, Quintin; Duncan, J. L. (1989) -
Different patterns of faecal egg output following infection of Scottish blackface lambs with Ostertagia circumcincta
Stear, M. J.; Bairden, K.; Bishop, S. C.; Duncan, J. L.; Karimi, S. K.; McKellar, Quintin; Murray, M. (1995-08)Faecal nematode egg counts were monitored in 184 Scottish Blackface lambs during natural exposure to a mixed, predominantly Ostertagia circumcincta infection and 12 lambs were selected which showed consistently zero (low ... -
The distribution of faecal nematode egg counts in Scottish Blackface lambs following natural, predominantly Ostertagia circumcincta infection
Stear, M. J.; Bairden, K.; Duncan, J. L.; Gettinby, G.; McKellar, Quintin; Murray, M.; Wallace, D. S. (1995-05)Faecal samples were taken in 2 consecutive years from Scottish Blackface lambs on a commercial farm in central Scotland to examine variation among lambs in the number of nematode eggs in their faeces. Samples were taken ... -
Forms of bovine pepsinogen in plasma from cattle with three different 'syndromes' of Ostertagia ostertagi infection
McKellar, Quintin; Eckersall, P. D.; Duncan, J. L.; Armour, J. (1988-01)Calves infected orally with third stage larvae of Ostertagia ostertagi or infected with adult O ostertagi by direct transplantation into the abomasum had raised plasma pepsinogen activity, as did four-year-old dairy cattle ... -
Further studies on the response to transplanted adult Ostertagia ostertagi in calves
McKellar, Quintin; Duncan, J. L.; Armour, J.; Lindsay, F. E.; McWilliam, P. (1987-01)Calves infected by surgical transplantation of adult Ostertagia ostertagi had raised levels of plasma pepsinogen and those in which the largest number of worms established also had elevated plasma gastrin concentrations. ... -
Local and plasma antibody responses to the parasitic larval stages of the abomasal nematode Ostertagia circumcincta
Sinski, E.; Bairden, K.; Duncan, J. L.; Eisler, M. C.; Holmes, P. H.; McKellar, Quintin; Murray, M.; Stear, M. J. (1995-09)Ovine isotype-specific antibody responses to the parasitic larval stages of the abomasal nematode Ostertagia circumcincta were measured in a simple, indirect enzyme-linked immunosorbent assay. Analysis of variance of ... -
Regulation of egg production, worm burden, worm length and worm fecundity by host responses in sheep infected with Ostertagia circumcincta
Stear, M. J.; Bishop, S. C.; Doligalska, M.; Duncan, J. L.; Holmes, P. H.; Irvine, J.; McCririe, L.; McKellar, Quintin; Sinski, E.; Murray, M. (1995-12)Following infection with Ostertagia circumcincta there was considerable variation in worm burdens, worm size and number of inhibited larvae even among sheep matched for age, sex, breed, farm of origin and history of parasite ... -
Response to transplanted adult Ostertagia ostertagi in calves
McKellar, Quintin; Duncan, J. L.; Armour, J.; McWilliam, P. (1986)Plasma pepsinogen levels became elevated in groups of recipient calves immediately after transplant with adult Ostertagia ostertagi. These rises occurred in both previously parasite-naive calves and in calves which had ...